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There are 4 siblings, 1 sister who is eldest and 3 younger brothers whose ages are equally spaced. Sum of brothers ages is equal to age of of the sister, however, 5 years ago, sum of age of brothers was half that of sister now. What is her present age (in years)?

A

12

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B

21

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C

30

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D

27

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Solution

The correct option is C 30

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